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Anatomy and Cell Biology
Anatomy and Cell Biology 3319
Peter Merrifield

Anatomy NotesJan 1212 Movements of the arm at the shoulder joint flexion moving arm forward extension moving arm backward adduction abduction medial rotation lateral rotation circumduction circular movement around shoulder 9 muscles cross the shoulder joint and move the arm 2 posterior muscleslatissimus dorsi and teres major 2 anterior musclespectoralis major and coracobrachialis the deltoid muscle and the 4 rotator cuff muscles Pectoralis major anterior muscle Is a large fanshaped muscle covering the upper portion of the chest and it is divided into clavicular and sternal parts Oclavicular head anterior surface of medialof clavicle sternocostal head anterior surface of sternum superior 6 costal cartilages aponeurosis of external oblique muscle Ilateral lip of intertubercular groove of humerus greater tubercle Actionflexion prime mover adduction medial rotation of armshoulder Innervationlateral and medial pectoral nerves C5C8 T1 Coracobrachialis anterior muscle Is a small cylindrical muscle Otip of coracoid process of scapula Imiddle 13 of medial humerus Actionflexes and adducts arm synergist of pectoralis major Innervationmusculocutaneous nerve C5C7 Teres major posterior muscle Is located inferior to the teres minor Odorsal surface of inferior angle of scapula Iintertubercular groove of humerus lesser tubercle of anterior humerus Actionextends adducts and medially rotates arm synergist of latissimus dorsi Innervationlower subscapular nerve C6 C7 Latissimus dorsi posterior muscle Is a triangular fanlike muscle of the lower back Ospinous processes of inferior 6 thoracic vertebrae thoracolumbar fascia iliac crest and lower 34 ribs Iintertubercular groove of humerus Actionextends prime mover adducts and medially rotates shoulder Innervationthoracod
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